Electrical connection plug



May 20, 1930. I M, c, PLLOK ET AL 1,759,805

ELECTRI CAL CONNECTION PLUG Filed April '7. 1928 wwm gwuwntoq "Pallpa it MCPOZZOGZL Patented May 20, 1930 umrsn STATES PATENT OFFICE MARTIN G. POLLOGK AND EARLE E. EOLLOOK, 01: DENVER, COLORADO ASSIGNORS OF ONE-FOURTH T JACOB WEISS AND ONE-FOURTH TO RICHARD S. SHANNON, BOTH 0F DENVER, COLORADO ELECTRICAL CONNECTION PLUG Application filedApril 7, 1928. Serial No. 268,240.

This invention relates to electrical connection plugs and more, particularly. to a plug of this character intended for use with household utensils such as irons, toasters,

6 wafile irons and the like.

An important object of the invention is to produce a structure providing an indication when the current is applied to the utensil of such character that it is not likely to be overlooked, so that the utensil is allowed to operate for a considerable time unattended with consequent liability to fire or destruction of the implement.

A further object of the invention is to provide a device of this character which may be readily embodied in the present day connection plugs with but a slight modification of the structure thereof.

A still further object of the invention is to provide a device of this character, wherein the signalling element is readily replaceable in event the same becomes broken.

These and other objects we attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of our invention and wherein Figure 1 is a side elevation of a connection plug constructed in accordance with our invention;

Figure 2 is a view showing the sections of the plug separated and illustrating the interior arrangement;

Figure 3 is a transverse sectional View;

Figure 4 is a detail view showing a modified structure in which a detachable socket in provided for the bulb.

All connection plugs, as at present manufactured, consist generally of a two part in its outer wall with openings 12 communicating with this recess through which the glow from this bulb may pass when active.

7 Means are provided for connecting the bulb across the contacts C. In the present instance, the type of connection plug illustrated is that ordinarily employed with electric irons. The lead wires ordinarily ordinarily extend through channels formed in the body at 13 to the inner ends of the contacts 0 which are held in position by screws.

It Will be obvious that these lead wires, due to the constant motion to which such devices are subjected and the possibility of careshort-circuit upon the bulb with such a construction. We accordingly provide adjacent the lead wire inlet opening 14. a pair of binding screws 15 to which these lead wires may be connected.

These binding screws are connected to the contacts C by metallic strips 16 and 17 which may be, if so desired, permanently connected with the contacts C. In the present instance, the strip 16 is shown as connected to its contact by being clamped thereto through the medium of a screw 18, while the strip 17 is shown as secured to its contact. This strip 17 is provided with a transverse extension 19 and the strip itself is preferably of spring brass, so that this extension may form a spring contact for engagement with a base contact 20 on the bulb 11L The screw base of the bulb has integrally connected therewith a contact lug 21 for engagement beneath the head of the screw 18, so that it may be rigidly held in proper position to engage the contact 19. If desired, a struction as illustrated in Figure 4 may be employed wherein a corresponding contact hereinbefore described except as hereinafter claimed.

We claim A two part electric plug having a passage extending therethrough and enlarged at its central portion, the plug being provided in a side thereof with an opening communicating with said enlarged portion of the passage, contacts arranged within one end of the passage, binding screws arranged within the other end of the passage, conductor strips extending across the enlarged portion oft 1e passage and secured to the contacts and binding screws, an elastic extension formed in tegrally with one of the conductor strips at the point of connection of the strip with its contact, a bulb having a contact engaging said extension and provided with a contact lug, and an element detachably securing the contact lug to the other conductor strip at the point wherethe strip is connected to its contact. In testimony whereof we afiix our signatures. MARTIN C. POLLOGK.

EARLE E. POLLOCK. 

